Back on topic...The memos are written in a type, font and setup that only word processors or (in 1973, as word processors didn't exist then) an IBM Selectric Composer are capable of.
Get this though, the IBM SC is a typesetter machine, which in today's dollars will run you a cool 22 grand. Just note that the Air National Guard's equipment is mostly hand-me-downs from the Air Force...
http://boortz.com/nuze/index.html for more info.